Subtract 56/90 from 3/20
3/20 - 56/90 is -17/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
56/90 = 56 × 2/90 × 2 = 112/180 - Subtract the two like fractions:
27/180 - 112/180 = 27 - 112/180 = -85/180 - After reducing the fraction, the answer is -17/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-56/90 3/40-56/90 9/20-56/90 3/60-56/90 15/20-56/90 21/20-56/90